Daniel J. Hopkins, Marc N. Meredith, Anjali Chainani, Nathaniel Olin, and Tiffany Tse
1/6/2021 

Replication Data for: "Results from a 2020 Field Experiment Encouraging Voting by Mail"

Codebook

Data set: replication-file-01052020.Rdata

Treatment assignment (generated by research team):

treat_20: Neighborhood or Self denotes which postcard registrant received (Control denotes no postcard)


Variables generated from 6/25/2020 mail ballot log:

DaysAppReturnedFmt: Days after March 10, 2020 that mail ballot application was received (NA denotes no application received; note: a few cases where someone has infeasible application receipt date were recoded to 0). 
DaysBallotReturnedFmt: Days after March 10, 2020 that mail ballot was received (NA denotes no ballot received). 
DiffAppReturnedDateFmt: Days after May 18. 2020 that mail ballot application was received (NA denotes no application received; note just a constant shift from DaysAppReturnedFmt). 
REQUESTED.MAIL.BALLOT: Indicator for whether mail ballot application was received (note: a few cases where someone is not indicated to to have requested a mail ballot, but has a date that the mail ballot was received)
REQUESTED.NEVER.RETURNED: Indicator for whether requested mail ballot went unreturned
MAIL.BALLOT.RECEIVED.BEFORE: Indicator for whether the returned mail ballot was received by June 2, 2020
MAIL.BALLOT.RECEIVED.AFTER: Indicator for whether the returned mail ballot was received on June 3, 2020 or after


Variables generated from voter history file updated summer 2020:

VOTED.MAIL.2020.PRIMARY: Indicator for whether mail ballot was returned (note: there are a few cases where in which a voter returned mail ballot without a record of request in the mail ballot log)
VOTED.INPERSON.2020.PRIMARY: Indicator for whether someone cast an in-person ballot (note: there are a few cases where someone is recorded as voting in person and appears in the mail ballot log)
VOTED.PROVISIONAL.2020.PRIMARY: Indicator for whether someone is part of the subset of in-person voters who cast a provisional ballot
VOTED.2020.PRIMARY: Indicator for whether someone cast either a mail or in-person ballot


Variables generated from voter history file updated spring 2019: 

party: Party of registration
ward: Ward of registration 
age_bin: Age group 
vote_history: Turnout history
sex: Sex


Variables generated from other sources:

pred.whi: Probability that registrant is White according to WRU applied to last name and census block group (NA denotes census block group geocode was not available)
pred.bla: Probability that registrant is Black according to WRU applied to last name and census block group (NA denotes census block group geocode was not available)
